I'm running my build on jenkins but when I run npm install --color=false --loglevel warn it generate a lot of subfolders, and I can't even delete them on windows (I have to rename them before that).
It has started to happen today, we didin't manually update anything

My packages.json file
{
"name": "contratanet-portal",
"version": "0.1.0",
"description": "Builder do contratanet portal",
"private": true,
"devDependencies": {
"grunt": "~0.4.5",
"grunt-shell": "~0.7.0",
"grunt-msbuild": "~0.1.12",
"grunt-nuget": "~0.1.3",
"underscore": "~1.6.0",
"karma": "^0.12.23",
"karma-jasmine": "^0.1.5",
"requirejs": "^2.1.15",
"karma-chrome-launcher": "^0.1.4",
"karma-firefox-launcher": "^0.1.3",
"lodash": "^2.4.1",
"karma-opera-launcher": "^0.1.0",
"karma-safari-launcher": "^0.1.1",
"karma-ie-launcher": "^0.1.5",
"karma-junit-reporter": "^0.2.2",
"karma-phantomjs-launcher": "^0.1.4",
"grunt-karma": "^0.9.0"
}
}